 <template>
  <div>
    <header>
      <slot name="left">
      </slot>
      <slot name="center"></slot>
      <slot name="right"></slot>
    </header>
  </div>
</template>
 <script>
export default {
  data() {
    return {};
  },
  methods: {},
  computed: {},
};
</script>
 <style lang='css'>
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
header {
  width: 100%;
  display: flex;
  flex-direction: column;
}
</style>